autobox example to subscript hashrefs like $x-<y-<z

Explanation: I've been writing config->{path}->{templates}, but I've been working around a Python programmer, and I've been trying to make my code as spiffy as possible, among other things to show off. I decided that this construct was ugly, and it would be much nicer if I could just write config->path->templates instead. After all, since config is a sub, why couldn't path and templates be methods? With autobox, you can call methods in non-blessed references, so this was easy as cake.